Lighting fixture arm



FIG. 1 is a left side view of the lighting fixture arm;

FIG. 2 is a right side view of the lighting fixture arm;

FIG. 3 is a back view of the lighting fixture arm;

FIG. 4 is a front view of the lighting fixture arm;

FIG. 5 is a top view of the lighting fixture arm; and,

FIG. 6 is a bottom view of the lighting fixture arm. 

The ornamental design for a lighting fixture arm, as shown and described. 